\begin{tikzpicture}
    \tkzDefPoints{0/0/C, 4/0/D,  2/2/A,  2/0/B}

    \tkzDrawSegments(A,B  C,D)
    \tkzMarkRightAngles[size=0.3](A,B,C  D,B,A)
    \tkzLabelAngle[pos=0.7](A,B,C){$1$}
    \tkzLabelAngle[pos=0.7](D,B,A){$2$}
    \tkzLabelPoints[below](B,C,D)
    \tkzLabelPoints[right](A)
\end{tikzpicture}

